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Tube Database (7,341 tube types · 1,270 archive entries)

Pre (2,630 tube types), Other (2,603 tube types), Power (1,292 tube types), Rectifier (816 tube types)
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20HP4, 20HP4A, 20HP4B, 20HP4C, 20HP4D vacuum tube outline illustration

Tube-number record

20HP4, 20HP4A, 20HP4B, 20HP4C, 20HP4D

0 archive entries

20HP4, 20HP4A, 20HP4B, 20HP4C, 20HP4D is a tube type in the TubeDatabase archive (class: Cathode Ray Tube). Recorded specifications: brand Tung-Sol, year 1954, construction Display / CRT, socket Duodecal, and maximum plate voltage 16000 V. The archive does not yet hold a photographed example of this type.

BrandTung-Sol
ClassCathode Ray Tube
BaseDuodecal
Filament6.3 V @ 0.6 mA

Construction

Primary TypeDisplay / CRT
EnvelopeRectangular Glass
Sections1

Filament / Heater

Heater NotesAC or DC

Absolute Maximum Ratings

Plate Voltage16000 V

Typical Operation

ModePlate VGm (µmhos)Rp (Ω)µPlate mA
Typical14000 V———0.1 mA

Filters

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Manufacturers

Brands

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    Grid 2 Voltage500 V
    Grid 1 Voltage125 V
    H-C Voltage410 V

    Audio Performance

    Key Features
    • Low voltage electrostatic focus
    • Magnetic deflection
    • Spherical faceplate
    • Grey filter faceplate
    • External single field ion trap
    • Rectangular glass construction